Antipick cylinder type lock



p 1953 H. R. SEGAL 2,653,467

ANTIPICK CYLINDER TYPE LOCK Filed Nov. 17, 1951 INVENTOR HYMGN R. seam.

ATTORNEY A Patented Sept. 29, 1953 z nes? UNITED STATES PATENT OFFICE ANTIPICK CYLINDER TYPE LOCK Hyman R. Segal, New York, N. Y.

Application November 17, 1951, Serial No. 256,894

3 Claims. (01. 70-359) This invention is an anti-pick cylinder lock wherein upper and lower sets of pin tumblers normally operate to hold the key receiving rotatable plug locked relative to the cylinder at a time when a mating key is out of the plug. One object of the invention resides in the provision of multiple spring carriers arranged within and at the upper ends of spaced openings of the cylinder for retaining oppositely coiled but concentric inner and outer helicoidal springs in a nested but unsnarled relation to effectively cooperate respectively with the upper set of driving tumbler pins and accompanying slidable sleeves slidably guiding this upper set of driving pins and wherein both the slidable sleeves and their accompanying slidable pins serve as means to appreciably depress the lower set of tumble-r pins and associates slidable sleeves downwardly into the key receiving slot of the rotatable plug. A more specific object is realized in the provision of an anti-pick cylinder lock characterized by standard parts adapted for convenient and rapid assembly. Other important objects andv functional and structural features of the invention will appear from the following detailed description considered in the light of the accompanying drawings wherein: g

Fig. l is a front elevational view of the cylinder lock according to my invention. 7

Fig. 2 is a vertical sectional view on the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary and appreciably enlarged view of Fig. 2.

Fig. 4. is an elevational view of one of the spring carriers and Fig. 5 is a slightly modified view of Fig. 4.

Fig. 6 is a fragmentary elevational view of the reversely coiled springs.

Illustrative of the embodiment disclosed, the anti-pick cylinder lock is generally designated CL and comprises cylinder or casing C and the rotatable plug P. More specifically, cylinder C includes the longitudinally arranged bore B rotatably guiding the cylindrical plug P which is interrupted by the key receiving slots KRS.

The cylinder is appropriately drilled to provide spaced vertically arranged circular openings lil adapted to align with the correspondingly spaced circular holes II formed in the rotatable plug P.

Slidably guided by the spaced bores constituted by holes it are the lower sleeves LS which in turn slidably guide the cylindrical tumbler pins T on which are seated the cylindrical upper set of driving tumbler pins D slidably guided by the upper set of cylindrical tubes or sleeves US which in turn are slidably guided by the cylindrical openings It] of the cylinder C and the aligned holes l I of the plug.

Inside helicoidal springs l2 act on the driving pins D to shift the latter in part into the plug 1?. Outside helicoidal springs it are seated on the upper sleeves US to also project the same into holes H of the plug. By this arrangement the plug is locked againstrotation as illustrated in Figs. 2 and 3.

" threaded cylindrical stem It. More particularly spring frictionally on its carrier until it meets the the upper end of an inside spring I2 is tightly threaded on a shank l5 which likewise is provided with a hel ical groove I! to receive and facilitate threading of the coils of this inside abutment andoverha'nging shoulder l8.

Shank [4 of each carrier also embodies a helical groove [9 adaptedto snugly and frictionally receive the upper end of an outside spring l3 which may be conveniently threaded on shank It until it meets the overhanging and stop shoulder 21 constituted by head H. It follows that each carrier CR has adequately fixed thereon a pair of nested but concentrically arranged helicoidal springs but it should be observed that such pair of springs are oppositely pitched or wound to pre elude snarling: Hence each carrier fixedly retains an inside and a companion outside spring disposed in concentric, fashion and these parts consequently constitute units bodily and severally insertible into openings Ill of the cylinder or casing C, thus facilitating assembly. Thereafter a conventional closure slab 26 is appropriately fastened to casing C in any well known manner, thereby maintaining the inside and outside springs of all the units effectively compressed to normally and automatically shift the upper set of drivers D and companion tubes Us downwardly to project in part into plug P to preclude its rotation.

With a properly mated key inserted into slot KRS tumblers T and companion sleevs LS areactuated, thereby elevating upper sleeves just flush with the bore B of the cylinder, consequently unlocking the plug to permit its rotation by the key.

In Fig. 5, the spring carrier is along the lines of form illustrated in Fig. 4 with the single exception that shanks I4 and stem i5 are unthreaded and companion nested springs (not shown) are frictionally forced thereon instead of being tightly and frictionally threaded in helical grooves as in the case of the carrier shown in Fig. 3.

Various changes may be made in details of construction and arrangement of parts without departing from the spirit of the invention or sacrificing any of the advantages thereof inherent therein.

I claim:

1. In an anti-pick look, a casing having a longitudinally arranged cylindrical bore and spaced openings normal to said bore and communicating therewith, a cylindrical plug rotatably guided by said bore and including a longitudinally disposed key receiving slot and having spaced holes I adapted to register with said openings, an upper set of sleeves slidably guided by said openings, driving pins slidably guided by said sleeves, a lower set of sleeves slidably guided bysaid holes, tumbler pins slidably guided by said lower set of sleeves, carriers slidably guided withinand at the upper parts of said openings, each of said carriers having a reduced shank and a reduced stem depending from said shank, outside helicoidal springs having their upper portions tightly retained on said shanks and having their lower portions abutting the upper faces of said upper set of sleeves, inside helicoidal springs within said outside springs and having their coils pitched oppositely to the coils of said outside springs and having their upper portions tightly retained on said stems and having their lower portions abutting the upper faces of said driving pins, and said springs normally urging said upper set of sleeves and said driving pins to removably project in part into said holes to preclude rotatation of said plug relative to said cylinder.

2. In an anti-pick lock, a casing having a longitudinally arranged cylindrical bore and spaced openings normal to said bore and communicatingtherewith, a cylindrical plug rotatably guided by said bore and including a longitudinally disposed key receivin slot andihaving spaced holes adapted to register with said openings, an-upper set of sleeves slidably guided by" said openings, driving pins slidably guided by said sleeves, a lower set of sleeves slidably guided by said holes, tumbler pins slidably guided by said lower set of sleeves, carriers slidably guided within and at the upper parts of said openings, each of said carriers comprising a head having a reduced and threaded shank and a reduced stem depending from said shank and having threads pitched oppositely to the threads of said shank, outside helicoidal springs having their upper portions interlocked with the threads of said shanks and having their lower portions abutting the upper faces of said upper set of sleeves, inside helicoidal springs within said outside springs and having their coils pitched oppositely to the coils of said outside springs and having their upper portions interlocked with the threads of said stems and having their lower portions abutting the upper faces of said driving pins, and said springs normally urging said upper set of sleeves and said driving pins to removably project in part into said holes to preclude rotation of said plug relative to said cylinder.

3. In an anti-pick look, a casing having a longitudinall arranged cylindrical bore and spaced openings normal to said bore and communicating therewith, a cylindrical plug rotatably guided by said bore and including a longitudinally disposed key receiving slot and having spaced holes adapted to register with said openings, an upper set of sleeves slidably guided by said openings, driving pins slidably guided by said sleeves, a lower set of sleeves slidably guided by said holes, tumbler pins slidably guided by said lower set of sleeves, carriers slidably guided within and at the upper parts of said openings, each of said carriers having a reduced externally threaded shank and a reduced externally threaded stem depending from said shank, outside helicoidal springs having their upper portions tightly interlocked with the threads of said shanks and having their lower portions abutting the upper faces of said upper set of sleeves, inside helicoidal springs disposed substantially concentrically within said outside springs and having their upper portions tightly interlocked with the threads of said stems and having their lower portions abutting the upper faces of said driving pins, and said outside and inside springs being oppositely pitched and normally urging said upper set of sleeves and said driving pins to removably project in part into said holes to preclude rotation of said plug relative to said cylinder, the stems of said carriers being concentrically arran ed in respect to the shanks of said carriers.

HYMAN R. SEGAL.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 593,436 Rydberg Nov. 9, 1897 917,365 Schoell Apr. 6, 1909 1,095,500 Hansen May 5, 1914 1,095,641 Johnson May 5, 1914 1,143,906 Hayne June 22, 1915 

